Perforating attachment for printing presses



J. F. GENTRY PERFORATING ATTACHMENT FOR PRINTING PRESS ES April 14, 1945.

Filed March 29. 1924 I ATTORNEY.

Patented Apr 14, 1925.

umrno stares.

JEFFERSON FRANKLIN GENTBY, 0E COGKEVILLE, TENNESSEE, ASSIGNOR OF ONE- SIXTH TO NORMAN MASSA AND ONE-SIXTH T0 li'LJOHNSON, BOTH OF COOKEVILLE, TENNESSEE.

PERFORATING ATTACHMENT FOR PRINTING PRESSES.

Application filed March 539, 1924. Serial No, 702,398.

To all whom it may concern:.

Be it known that I, Jnrrnnsozr FRANKLIN GENTRY, a citizen of the United States, residing at Cookeville, in the county of Putnam and State of Tennessee, have invented certain new and useful Improvements in Perforating Attachments for Printing Presses, of which the following is a specification.

This invention relates to a perforating attachment for printing presses and has for its object to provide, in a manner as hereinafter set forth, an attachment of the class referred to, having a series of perforating elements and further having means whereby the said elements when active will permanently operate clear and not against or into the tyinpan sheet of the platen so as to insure satisfactory work at all times when the attachment is operated.

A. further object of the invention is to provide, in a manner as hereinafter set forth, a perforated attachment for the purpose referred to, having means to provide for the automatic discharge of the cuttings, formed by the perforating operation, from the platen.

Further objectsof the invention are to provide, in a manner as hereinafter set forth, a perforating attachment operating synchronously with the printing of the work, simple in its construction and arrangement, strong, durable, compact, readily installed in operative position with respect to a platen,

' thoroughly efficient in its use, and comparatively inexpensive to manufacture.

With the foregoing and other objects in view, the invention consists of the noval construction, combination and arrangement of parts, as hereinafter more specifically described and illustrated in the accompanying drawings, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views Figure 1 is a fragmentary view,-in perspective, of a printing press of the'job type,

showing the adaptation with the platen thereof of a perforating attachment in accordance with this lIlVBIltlQIL ure 8.

Figure 6 is a fragmentary view, in section, of a modified form of attachment.

Referring to the drawings in detail, 1 denotes the platen of the press and 2 the tympan sheet secured to one face of the platen 1. The sheet 2 is formed of two sections 3, l, which are spaced from each other to provide an opening 5, or the sheet 2 can be cut away transversely so as to form the opening 5 Positioned within the opening 5, as well as being secured to the platen 1, is a pair of wooden strips 6, 7, which are rectangular in contour and have their outer faces flush with the outer face of the sheet 2.

The strips 6 and 7 do not completely close the opening 5, whereby the opposed side edges of said strips will form a space therebetween, asindicated at 8, and arranged within the space 8 is the bed piece of the attachment and which has its outer face flush with the outer faces of the strips ,6, T.

A perforating attachment, in accordance with this invention comprises astationery bed piece and a spring controlled carrier for a resiliently supported perforatingdevice.

The bed piece is of a length greater than the width of the platen l and comprises a wide portion 9 and a narrow portion 10, which extends upwardly from the portion 9. The bed piece has its lower face formed-with a channel 11 which extends, from one end to the other end of'said bed piece, and the. lower end of said channel is always permanently open.

' Secured to or formed integral with the upper face of the'wide portion'9 of the bed piece, is a pair off-spaced brackets 12, 13, having the outer ends thereof extended upwardly, as at 14. The upwardly extending end 14 of the bracket 12 is formed with an opening 15, and the upwardly extending end of the bracket 13 is formed with an opening 16, having a threaded wall. The openings 15 and 16 align with each other.

The narrow portion lOof the bedpiece,-.

intermediate its ends, is formed with a series of openings 17, arranged in a row extending lengthwise of said portion 10.

Connected to or formed integral with the lower face of the wide portion 9, as well as projecting from the free end of said portion is an attaching block 18 provided with a forwardly extending rib 19 at the inner end thereof, and carried by the rib 19 is a thumb screw 20. The rib 19 is positioned at the inner end of the block 18 in such a manner that the platen 1 can extend between said rib l9 and the wide portion 9 of the bed piece, as illustrated in Figure 3. When the platen 1 is positioned against the block 18, in the manner shown in Figure 3, the thumb screw 20 is shifted to bind the platen 1 against the wide portion 9 of the bed piece.

Secured to the lower face of the narrow portion 10 of the bed piece, at the free end thereof and near the channel 11, is an angleshaped resilient clamping member 21 for connecting the upper end of the attachment to the outer side edge of the platen 1. The member 21 is formed with a pair of oppositely disposed terminal portions 22, 28 and with the terminal portion 22 extended into the channel 11 and fixedly secured to the narrow portion 10 by the hold-fast devices 2 1-. The terminal portion 23 projects away from the platen 1. The member 21, in connection with the block 18, detachably connect's the perforating attachment in position upon the platen 1.

The spring controlledcarrier is formed from a bar25 of substantial length, pro vided with an enlarged lower end 26, which is positioned between the ends 1 1 of the brackets 12 and 13. Extending through the enlarged ends 14 of the brackets 12 and 13 and through the end 26 of the bar 25-, is a pivot bolt 2?, which threadedly engages with the threads of the wall of the opening 16. The bar 25, intermediate its ends, is formed with a longitudinally extending; pocket 28, which opens at the upper face of the bar 25 and has its bottom formed with a series of openings 29, adapted to align with theopen ings 17'.

Projecting rearwardly from the lower end 26 of the bar 25, is a stud 80, which is connected by a coiled pulling spring 31to a stud 32 extending rearwardly from the block 18. The function of the spring 31 is to normally maintain the carrier in an elevated position, as shown in Figure 3.

The perforating device consists of a. head member 33, arranged within the pocket 28, and which is provided with a series of perforating elements or plungers 34, which 0perate through aligning openings 17 and 29. Connected. to each end of the head member 38 is a flat suspension spring 35 secured to the bar 25 by the' hold-fast devices 36, and the said springs 35 normally maintain the perforating device extended with respect to the pocket 28. The perforating elements operate through aligning openings 17 and 29 for the purpose of perforating the work which is positioned upon the bed piece and tympan sheet, and said elements when perforating the paper enter the channel 11. The cuttings formed during the perforating operation automatically pass down through the channel 11 and are discharged at the lower end thereof.

For limiting the upward movement of the carrier, the end 26 is provided with a stud 37 which abuts against the upper portion of the lower end edge of the wide portion 9 of the bed piece, as shown in Figure 3.

The platen 1 provides the bottom 9f the channel 11 for a portion of its length, and the remaining portion of the bottom of the channel 11 is provided by the block 18. See Figure 3.

The upper end of the narrow portion 10 of the bed piece has the top thereof formed with an enlarged opening 38, so that access can be had to the channel 11 when desired.

In the modified form shown in Figure 6, the studs 30, 32, 37 and the spring 31 are dispensed with, and in lieu of employing the spring 81 for thepurpose of maintainingthe carrier 25 normally extended, a fiat curved spring 39 is employed, which is secured to the lower face of the carrier 10, as at 11, and

has its curved free end 12 seating on the upper face of the wide portion 9 of the bed piece. The spring 39 extends between the brackets 12 and 13.

The forward ends of the brackets 12, 13, constitute stops 43 for the work.

The strips'b and 7, which are arranged at each side of the bed piece of the attachment, make a level bed for printing and perforating at the same time. lVhen the press is open the perforating attachment is open, but when the platen shifts towards the plate the carrier is shifted towards the bed piece, so that when the work is printed upon, the perforating device is shifted so that the elements 34; will be forced through the work and perforate the same. The perforations of the narrow portion 10 of the bed piece constitute what may be termed dies for the perforating element. The cuttings formed during the perforating operation are discharged through the channel 11. As the platen moves away from the plate, the car rier automatically moves to open position.

It is thought that the many advantages of a perforating attachment in accordance with this invention can be readily understood, and although the preferred embodiment of the invention is as illustrated and described, yet changes in the details of construction can be had which will fall within the scope of the invention as claimed.

What I claim is:-

1. A perforating attachment for the purpose set forth comprising a stationary bed piece provided with a channel for the discharge of cuttings formed during the pertorating operation, said channel permanently open at one end, said bed piece further provided with a plurality of openings coinlnunicating with said channel, a spring controlled carrier pivotally connected to one end of said bed piece and provided with a plurality of openings intermediate its ends and adapted to register with the openings in the bed piece, and a resiliently supported perforating deviceconnected with said carrier, shittably mounted therein and provided with a plurality of perforating elements operating through the registering openings of the carrier and bed piece, an attaching block connected to the lower end of the bed piece and a resilient clamp connected to the upper end of the bed piece, said clamp and block providing means for detachably connecting the bed piece to a platen.

2. A. perforating attachment for the purpose set forth comprising an apertured bed piece adapted to be detachably connected to a platen and provided with a channel for the automatic discharge of the cuttings formed during the perforating operation, a spring controlled apertnred carrier pivotally connected to said bed piece, a resiliently supported perforating device connected to and shittable within the carrier and provided with perforating elements extending when operating through said carrier and. bed

piece into said channel, and an attaching block and resilient clamp carried by the bed piece and providing means for detachably connecting the bed piece in operative position upon a platen.

3. A perforating attachment for the purpose set forth comprising a bed piece pro vided in its lower face with a channel eX- tending from end to end thereof, said channel having its lower. end permanently open, said bed piece further provided with a plurality of openings communicating with said channel, an attaching block carried by the lower end oi? the bed piece and forming a portion of the bottom of said channel, a re-.

silient clai'np secured within said channel at the upper end thereof, said block and clamp providing means for detachably connecting the bed piece to a platen whereby the latter will form the remaining portion of the bottom oi the channel, a spring controlled carrier pivoted to said bed piece and provided with a plurality of openings adapted to register with the openings in the bed piece, said carrier further provided with a pocket, and a spring controlled perforating device shittabiy mounted in said pocket and provided with a plurality of perforating elements operating through registering openings to perforate the work when said device is shifted into said pocket.

lln testimony whereof, I affix my signature hereto.-

JEFFERSON FRANKLlN GENTRY. 

